Epilepsy in Alzheimer's Disease: Effect on Disease Progression

This is a long-term, prospective, interventional study to investigate the role and prevalence of subclinical epileptiform activity in the hippocampus in patients with mild cognitive impairment (MCI) due to Alzheimer's disease (AD). The investigators would like to investigate whether subclinical epileptiform activity in the hippocampus is more prevalent in patients with MCI, compared to healthy controls and to evaluate its effects on cognitive decline. Evolution of cognitive decline will be assessed over a time period of two years.